israeli prime minister benjamin netanyahu says he believes that president obama is determined to keep iran from developing nuclear weapo weapons. he reiterated israel's determination to take military action necessary. the two leaders discussed reports about the use of chemical weapons in syria. crossing of president obama's red line. we have fox team coverage tonight. rosen looks at the iran issue but we begin with ed henry in jerusalem with worries over the deadly action in neighboring syria. hello, ed. >> reporter: good evening, bret. most significant with the president's strong tone throwing out the possibility of military action. he has issued the warpings before. >> talking tough in the first public comments that chemical weapons have been used in syria, president obama said the regime in damascus will be held accountable. >> when you start seeing weapons that can cause potential devastation and mass casualties, and you let that genie out of the bottle, then you are looking potentially at even more horrific scenes than we have already seen in syria. international community has to